Ext.define('MyApp.view.Navigation', {
    extend: 'Ext.tree.Panel',
    xtype: 'navigation',
    title: '导航栏',
    iconCls: 'Navigation',
    rootVisible: false,
    lines: false,
    useArrows: true,
    tools: [
         { type:'refresh' ,tooltip: '刷新导航栏'}
    ],
	viewConfig : {  
	    loadingText : "加载数据..."  
	}, 
	store:'NavigationMenuStore'
});